@melott
Where exactly is the KSRemap file on your system? Remember, when you first start up the machine (no startup-sequence), the only places the system looks for stuff is
Current Directory
C:
Further into the boot sequence, a load of additional search paths are added by the PATH command to cover utilites, tools, system etc.
Assuming your KSRemap file is in the Utilities drawer, you should just do
Utilities/KSRemap QUIET
as Patrik suggests.
To be totally certian, you can even prefix with SYS:, eg
SYS:Utilities/KSRemap QUIET
Of course, if your KSRemap file is in some other drawer, you must make sure the full path to the file is specified.
-edit-
Incidentally, it isn't a good idea to put these kinds of low level commands into WBStartup. This drawer is meant to be used for tools that should be started when workbench is opened, not when the system starts booting.
